package com.waner.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.waner.reggie.common.R;
import com.waner.reggie.entity.Employee;
import com.waner.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){

        // 1. 将页面提交的密码进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        // 2. 根据页面提交的username查数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        // 3. 如果没有查询到则返回登录失败结果
        if(emp == null){
            return R.error("登录失败");
        }

        // 4. 比对密码，如果不一致则返回登录失败
        if(! emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        // 5. 查看员工状态，如果已经禁用，则返回员工已被禁用结果 0表示禁用-1表示可用
        if(emp.getStatus() == 0 ){
            return R.error("账号已禁用");
        }

        // 登录成功，将员工id存入Session，并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        // 清理Session中保存的员工的id
        request.getSession().removeAttribute("employee");
        // 跳转到登录页面
        return R.success("退出成功");
    }


    /**
     * 新增员工
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee){
        log.info("新增员工,员工信息 {}", employee.toString());

        // 设置初始密码123456，进行md5的加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

//        // 设置创建时间和记录更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        // 设置创建人和更新人的id
//        Long empId = (Long)request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工的分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        log.info("page = {}, pageSize = {}, name = {}", page,pageSize,name);

        // 构造分页构造器
        Page pageInfo = new Page(page,pageSize);

        // 构造条件构造器  select * from employee where  `name` like name
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        // 如果name不为空，则添加过滤条件
        queryWrapper.like(!StringUtils.isEmpty(name),Employee::getName,name);
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        // 执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工的信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){

//        Long empId = (Long)request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);

        return R.success("员工修改信息成功");
    }

    /**
     * 根据id来查询员工的信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id来查询员工信息");
        Employee employee = employeeService.getById(id);
        if(employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
